<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <button id="btn">请求数据</button>
  <ul id="ul"></ul>

  <script>
    let btn = document.getElementById('btn')
    let ul = document.getElementById('ul')

    // ajax
    function getData() {
      let xhr = new XMLHttpRequest();
      xhr.open('GET', 'https://mock.mengxuegu.com/mock/65a91543c4cd67421b34c898/movie/movieList', true)
      xhr.send();
      xhr.onreadystatechange = function() {
        if (xhr.readyState === 4 && xhr.status === 200) {
          console.log(JSON.parse(xhr.responseText));
          const movieList = JSON.parse(xhr.responseText).movieList
          renderLi(movieList)
        }
      }
    }

    function renderLi(arr) {
      arr.forEach(item => {
        let li = document.createElement('li');
        li.innerText = item.nm
        ul.appendChild(li);
      });
    }
   
    btn.addEventListener("click", () => {
      getData()
    })
  </script>

</body>
</html>